72071677 has 2 divisors, whose sum is σ = 72071678. Its totient is φ = 72071676.

The previous prime is 72071663. The next prime is 72071711. The reversal of 72071677 is 77617027.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57851236 + 14220441 = 7606^2 + 3771^2 .

It is a cyclic number.

It is not a de Polignac number, because 72071677 - 2¹⁹ = 71547389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72071647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36035838 + 36035839.

It is an arithmetic number, because the mean of its divisors is an integer number (36035839).

Almost surely, 2^72071677 is an apocalyptic number.

It is an amenable number.

72071677 is a deficient number, since it is larger than the sum of its proper divisors (1).

72071677 is an equidigital number, since it uses as much as digits as its factorization.

72071677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28812, while the sum is 37.

The square root of 72071677 is about 8489.5039313260. The cubic root of 72071677 is about 416.1547689811.

The spelling of 72071677 in words is "seventy-two million, seventy-one thousand, six hundred seventy-seven".